Stop motion for roving and spinning machines



Aug. 1, 1933. w. J. SCOTT I 1,920,767

STOP MOTION FOR RCVING AND SPINNING MACHINES Filed April 28. 1951 "ma ni- E WW EN IN VEN TOR.

ATTORNEYS.

Patented Aug. 1933 Lenin s roP MorIoN FQRVROVING ND SPINNING MAonrNns Walter J. scothlvoonsocket, R. I. 1 Application April 28, 1931. Serial No. 534,503 g 7 Claims. (01. 19165) Mypresent invention relates to stop motions for textile machines, and has particular references to stop motion for roving and spinning machines. 7

The stop motions heretofore used in drawing machineshave utilized imperfections in the sliver, such as enlargements, or the weight of a broken sliver, to shift the stop control parts and stop the machine. Suchpositive actuation of the stop motions by the sliver itself is not possible in the roving and spinning machines, where the threads lack the. necessary weight to positively shift the stop control, parts.

The finer threads, however, have much greater tensile strength than the larger sliver, and may be utilized indirectly by utilizing gravity to shift the stop control parts and holding these parts against movement byothe tensile strength of the threads.v One object of my invention is to so proportion and mount a stop motion as to normally hold the control parts against movement under the influence of gravity by the tensile strength of the threads." 5 Another feature of stop motions asapplied to drawing operations has resided in the application of the stop motion to the machine as a whole. While' this feature is desirable for all the heavier drawing operations, it is not desirable for the finer roving and spinningirames, where thenumber of spindles is large. Morea over, it often happens that replenishment of a particular thread upon breakage, is more advantageously deferred until a general replenishment is necessary. In such. case, itis preferred to permit further operation of the remainingspindles, this arrangement also permitting use of part of the roving or spinning frame when desired. Another object of my invention is to so mount stop motions on a roving or spinning machine as to permit independent control of individual spindles.

With these and, other objects and ladvantageous features in view, my, invention consists closed in the detailed description following, in conjunction with the accompanying drawing, and more particularly defined in the appended claims.

In the drawing: 7 I Fig. 1 is a diagrammatic view, partly in section, showing the mountingof the novel stop motion; I

Fig. 2 is a front elevation thereof;

Fig. 3 is a view similar to Figure 2, with parts of a novel arrangement of parts morefully disbroken away, the interior parts being in turned position;

Fig. 4 is a section onthe line 44 of Figure 3; Fig. 5 is a rear elevation of Figure 3; and Fig. 6 is a diagrammatic view showing the machine belt shifting apparatus, and the control therefor. f f g i It has been found desirable to utilize thetensile strength of a fine drawn thread for holding a gravity responsive stop element against contacting to close the "stop circuit;- andit has also been found desirable to mount a plurality of such stop elements on a roving or spinning machine and to provide independentcontrols for each element. I have therefor-edevised a stop device which includes a pivotedelement, swingable under the influence of gravity 'to close a stop'circuit; and 'I have utilized the strength of the thread 1:0

normally hold this swingable element out of contacting position. Ihave also devised a control for positively holding any desired swingable control out of contacting position; and the following is a detailed description of'aspeoific construction which embodies the principles of my invention. i

Referring to the drawing, the reels lii containing the thread are mounted as usual to feed the thread through the guides 11 to the back feed' 5 rolls 12, the thread then passing through the twist holding rolls 13 to the front feed rolls 14, and then through the usual guide'opening 15 to the spindle 16. The spindle may be the cap or butterfly type, dependent on'the size of the thread, but as'illustrated is of the cap type.

The novel stop motion, designated generally as 17, is mounted between the reel and the back feed rolls, and includes a base 18, preferably of cast metal, with bored lugs 19 through WhlCh'95 the-hinge rod 20 extends, a screw or the like 21 in the center lug serving to lock the hinge rod in place.

Pivotally mounted on the hinge rod between the end and center lugs are two contact rods or tubes 22," the upper'ends being threaded to receive the threaded'ends of wires 23'which are loopedto threadingly receive the threads 11; a lock nut 24 is used to hold each wire in adjusted position.

The base 18, asbest shown in Figures 2 and 4, is transversely bored at each end to receive contact bolts '25, which 'are'locked in place by lock nuts 26, insulating washers 27 being positioned between the lock nuts and the base. A 0

contact bar 28 is mounted on the projecting ends of the bolts 25, between the heads thereof and lock nuts 29, and. is adapted to be contacted by the contact rods as hereinafter described.

A contact control bar 30 extends through the center portion of'the base, the rear portion being bent to provide a manually operable handle 31 and the front portion mounting a control blade 32 which is secured between lock nuts 33. The blade 32, as best shown in Figures 2 and 3,

has two arms with the corners bent so as.to

facilitate engagement of the arms with the con tact bars 22 on rotation of the control handle 'two or more reels are .threaded .through the eyes of thefwires23, and

then passed through the guide-ll to the back 'feed rolls- The tension .of the threads on the eyes normally keeps theIcQntact bars .in upright .position, as shown in full lines in Eigure 1, the

setting of the stop motion being such as'tograv ,ity-u'rge the .contactrod downwardly, as in cated in dotted lines in Figure 1.

If a thread breaks, the associated contact .rod .falls, closes the stop circuit, and thus releases the .latch member .toishiit the belt and stop the machine. If the attendant does not wish to repair the break immediately, the handle 31 :is turned-thus holding the contact rods positively away' from the contact bar, and permitting operation of the remaining spindles.

,This .arrange'mentalso permits use of as many spindles as are desired, up to the full capacity of the machine. I ,7

My improved stop motion therefore .utilizes the-strength of the thread to hold a s'to'pinotion contact rod from contacting position, and is adapted to cut outoneor more spindles as desired without affecting the-operation of the remaining spindles.

. While .I havedescribed-one specific [embodiment' or" my invention, such changes .in arrangement and in proportions .-may be made as are within'the spirit and the scope of my in- .vention asdefined in the appended claims.

I claim; A

1. In-a stop motion, abase, a contact element thereon, a second contact element ..hinged1y mounted on said base and movable towards said first contact element, means operable by tensile strength of the thread .forholding said second contact element away from contacting engage- '-.second contact element hingedly mounted on I said base andmovable to engage said first contact element and having a thread receiving porelement, and a thread eye on the end of said "movable contact element thru which a thread ing said second contact element away from contacting engagement.

2. In a stop motion, a base, a contact element thereon, a second contact element hingedly mounted on said base and gravity-urged towards said first contact element, means operable by tensile strength of the thread for holding said second contact element away from contacting engagement, 'and'additional means mounted on said .base, movable forengaging and positively holdingsaid second contact element away from contacting engagement.

'3. Ina stop motion, a base, a contact element mounted onsaid base and spaced therefrom, a

tion thereon, andan element mounted on said base and movable to engage said second contact element and lock it against contacting engagement with said first contact element.

4. In a stop motion," a base,-a contact element mounted on said base and spaced therefrom, a

second, contact element hingedly mounted on said base and gravity-urged to engage said first contact element and having a thread receiving eye portion thereon, andan element mounted on said base andmov'able .to engage said'second contact element and lock it against contacting engagement with said first contact element.

5. 'In a stop motion, a base, a contact bar mounted transversely thereof and spaced therefrom, a plurality of contact rods hingedly -mounted on saidbase and 'engageable with said contactbar, said rods having eye portions to re- 1? ceive threads, and 'a control member mounted on said'base and movable to engage said contact rods and lock said contact rods against contacting engagement withsaid contact bar.

,6. In a stop motion, a base, a contact bar transve'rsely'mounted on said base and spaced therefrom, a plurality of contact rods hingedly mounted on said base in a positionto be gravitya thread receiving ur ed to engage said bar,

portion on each of said rods, a movable member havinga locking member on the end thereof .mounted on said base and'movable to engage said rods to lock them against contacting engagement with said bar.

7. n a stop motion,a base positioned in generally a vertical plane, a fixed contact element, means for fixedly supporting said element from 'said base and in spaced relation thereto, a

movable contact element located between said fixed element and base, means on said base for .pivoting said movable contact element at its lower end and at a point below said fixed central element and at .a location to swing by gravity away "from said base and towards said fixed,

extends that the tension on the thread may maintain the movablecontact element out of contact with the fixed contact element.

ment, and additional means mounted onsaid base, movable for engaging and positively hold- WALTER J. SCO'I'I. 

